Great-grandson of BASF founder Friedrich Engelhorn, he studied chemical engineering in Texas after World War II. In May 1997 engineered sale of pharmaceutical companies Boehringer Mannheim and DePuy to Roche for $11 billion. Personal take was $4.4 billion. Engelhorn, whose mother was American, funded the new Heidelberg Center for American Studies at the University of Heidelberg. Retired, lives in Switzerland with fourth wife, Heidemarie.